Sobre un bloque de 40 N se aplica una fuerza cuya magnitud es de 15 N formando un ángulo de 25° con la horizontal, como se ve en la figura. Si el bloque adquiere una aceleración cuya magnitud es de 1.5r m/s2. Calcular el coeficiente de fricción dinámico.

What can you increase the strength of an electromagnet by

Which best describes the first law of thermodynamics as compared to the second law of thermodynamics? a. the first law describes how thermal energy is conserved but not the direction it moves. b. the first law describes the direction thermal energy moves but not how it is conserved. c. the first law describes how thermal energy can be created but not how it can be destroyed. d. the first law describes how thermal energy can be destroyed but not how it can be created.

Which of the following list the divisions of the geologic time scale in order from longest to shortest